How is washing soda prepared from sodium...

How is washing soda prepared from sodium carbonate ? Give its chemical equation. State the type of this salt. Name the type of hardness of water which can be removed by it ?

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• By recrystallisation of sodium carbonate.
`Na_2CO_3 + 10H_2Orarrunderset("Washing soda")(Na_2CO_3"."10H_2O)`
• It is a basic salt.
• Permanent hardness of water can be removed.

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(a). Describe how washing soda is produced starting from sodium chloride (common salt). Write equations of all the reactions involved. (b) State whether an aqueous solution of washing soda is acidic or alkaline? Give reason for your answer. (c) What is meant by saying that washing soda has detergent properties? (d) Give two important uses of washing soda (or sodium carbonate).

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